#include "os_interface.h"

class MyIocService : public OSIoc
{
public:
    virtual ~MyIocService() {}

    virtual int init()
    {
       
    // Allocate the resources required by the service

    int m_numDataBuffers = 10;
    int m_numParamBuffers = 5;

    int m_maxDataSizes[] = new int[m_numDataBuffers];
    int m_dataSizes[] = new int[m_numDataBuffers];
    int m_maxParamSizes[] = new int[m_numParamBuffers];
    int m_paramSizes[] = new int[m_numParamBuffers];

    m_dataBuffers = new uint8_t*[m_numDataBuffers];
    for (int i = 0; i < m_numDataBuffers; ++i)
    {
        m_dataBuffers[i] = new uint8_t[1024];
        m_maxDataSizes[i] = 1024;
        m_dataSizes[i] = 0;
    }

    m_paramBuffers = new uint8_t*[m_numParamBuffers];
    for (int i = 0; i < m_numParamBuffers; ++i)
    {
        m_paramBuffers[i] = new uint8_t[64];
        m_maxParamSizes[i] = 64;
        m_paramSizes[i] = 0;
    }

    return 0;
    }

  virtual int deinit()
{
    // Clean up the resources that are allocated by the service

    for (int i = 0; i < m_numDataBuffers; ++i)
    {
        delete[] m_dataBuffers[i];
    }
    delete[] m_dataBuffers;

    for (int i = 0; i < m_numParamBuffers; ++i)
    {
        delete[] m_paramBuffers[i];
    }
    delete[] m_paramBuffers;

    delete[] m_maxDataSizes;
    delete[] m_dataSizes;
    delete[] m_maxParamSizes;
    delete[] m_paramSizes;

    return 0;
}

    virtual int start()
    {
        // Start the service here
            if (m_isRunning)
        {
            return -1; // Service has already been started
        }

        // Start the service here
        m_isRunning = true;

        return 0;
       
    }

    virtual int stop()
    {
        // Stop the service here
            if (!m_isRunning)
        {
            return -1; // Service has already been stopped
        }

        // Stop the service here
        m_isRunning = false;
        return 0;
    }
//     在这个示例中，我们假设服务存储了多个数据缓冲区和对应的数据大小。
//     当收到读取请求时，我们首先获取所请求的数据缓冲区和数据大小。
//     然后，我们检查用户提供的缓冲区大小是否足够存储请求的数据。
//     如果用户提供的缓冲区大小超过了请求的数据大小，我们将其缩小到与请求的数据大小相同。
//     接下来，我们将请求的数据从服务的缓冲区中复制到用户提供的缓冲区中，并将数据缓冲区清空
//     。最后，我们将请求的数据大小设置为零，并返回已复制的数据大小。

// 需要注意的是，在实际的应用中，我们需要根据具体的需求来实现read函数，以完成服务的特定功能。
// 例如，我们需要检查读取请求是否合法，或者将多个数据缓冲区合并为一个大缓冲区。
    virtual int read(int index, void* buffer, int maxSize)
    {
        // Get a pointer to the data buffer
        uint8_t* dataBuffer = m_dataBuffers[index];

        // Get the size of the data in the buffer
        int dataSize = m_dataSizes[index];

        // Check if the buffer size is larger than the data size
        if (maxSize > dataSize)
        {
            maxSize = dataSize;
        }

        // Copy the data to the user buffer
        memcpy(buffer, dataBuffer, maxSize);

        // Clear the data buffer
        memset(dataBuffer, 0, dataSize);

        // Set the data size to zero
        m_dataSizes[index] = 0;

        return maxSize;
    }

   virtual int write(int index, const void* buffer, int size)
{
    // Get a pointer to the data buffer
    uint8_t* dataBuffer = m_dataBuffers[index];

    // Get the maximum size of the buffer
    int maxDataSize = m_maxDataSizes[index];

    // Check if the user-supplied data size exceeds the maximum size of the buffer
    if (size > maxDataSize)
    {
        size = maxDataSize;
    }

    // Copy the user-supplied data to the buffer
    memcpy(dataBuffer, buffer, size);

    // Set the data size to the user-supplied data size
    m_dataSizes[index] = size;

    return size;
}


  virtual int setParameter(int index, const void* value, int size)
{
    // Get a pointer to the parameter buffer
    uint8_t* paramBuffer = m_paramBuffers[index];

    // Get the maximum size of the parameter buffer
    int maxParamSize = m_maxParamSizes[index];

    // Check if the user-supplied parameter size exceeds the maximum size of the buffer
    if (size > maxParamSize)
    {
        size = maxParamSize;
    }

    // Copy the user-supplied parameter to the buffer
    memcpy(paramBuffer, value, size);

    // Set the parameter size to the user-supplied parameter size
    m_paramSizes[index] = size;

    return size;
}

    virtual int getParameter(int index, void* buffer, int maxSize)
{
    // Get a pointer to the parameter buffer
    uint8_t* paramBuffer = m_paramBuffers[index];

    // Get the size of the parameter in the buffer
    int paramSize = m_paramSizes[index];

    // Check if the buffer size is larger than the parameter size
    if (maxSize > paramSize)
    {
        maxSize = paramSize;
    }

    // Copy the parameter to the user buffer
    memcpy(buffer, paramBuffer, maxSize);

    // Set the parameter size to zero
    m_paramSizes[index] = 0;

    return maxSize;
}
};